Gold hemp stone can also "drop powder "?

The characteristics of gold hemp stone are very obvious, the color is mainly yellow, the texture is hard, the color is soft, and the pattern is uniform, which is very suitable for home decoration and wall decoration, and the square ground has also been used a lot.
I believe that many people who have come into contact with it understand that when touching the gold hemp stone, a layer of floating powder will be erased from the surface, and small particles will fall. "Powder dropping" is a process of physical weathering, and it is also a crushing phenomenon of rocks under various stresses. Common sources of stress are:
Salt: Crystallizes in the pores of the gold stone or forms hydrate when it meets water, becomes a solid volume expansion, repeatedly dissolves, crystallizes, expands micropores, and forms surface cracks and scale-like spalling.
Water freezes: When water freezes, freeze-thaw occurs. When the temperature drops, it will freeze and thaw, and the gold hemp stone will freeze inside or around the gap, resulting in expansion; When the temperature rises, the freeze and thaw disappear, the gold hemp stone will also shrink, after repeated expansion and contraction, there will be cracks.
Dry and wet cycle: Because in different seasons, different weather, different periods, the surface may alternate dry and wet changes. If the gold hemp stone has not been treated with disease resistance, it has hydrophilicity and obvious hygroscopic expansion characteristics, the wet stone will expand (about 0.1%-0.01%), after drying and contracting, frequent dry and wet changes are easy to cause the gold hemp stone to fracture and accelerate the surface weathering.
Hot and cold cycle: When the surface is heated by sunlight and cooled at night, the surface constantly expands and contracts in heat and cold, and the cycle is repeated day after day. Cold, heat, dry, wet periodic changes in pressure, after a long time will lead to cracks.
Due to resource problems, affected by the geographical environment, the quality difference is large, pure gold hemp stone because of a long history, can not be returned to the high-quality mine, and highly respected by domestic and foreign customers.